From: David Woodhouse <dwmw2@infradead.org>
To: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: linux-kernel@vger.kernel.org, linux-rt-devel@lists.linux.dev,
Ben Segall <bsegall@google.com>, Boqun Feng <boqun@kernel.org>,
Clark Williams <clrkwllms@kernel.org>,
Dietmar Eggemann <dietmar.eggemann@arm.com>,
Ingo Molnar <mingo@redhat.com>,
Juri Lelli <juri.lelli@redhat.com>,
K Prateek Nayak <kprateek.nayak@amd.com>,
Mel Gorman <mgorman@suse.de>, Michal Hocko <mhocko@suse.com>,
Peter Zijlstra <peterz@infradead.org>,
Sean Young <sean@mess.org>, Steven Rostedt <rostedt@goodmis.org>,
Thierry Reding <thierry.reding@gmail.com>,
Valentin Schneider <vschneid@redhat.com>,
Vincent Guittot <vincent.guittot@linaro.org>,
Waiman Long <longman@redhat.com>, Will Deacon <will@kernel.org>
Subject: Re: [PATCH] sched: Allow sleeping spinlocks on PREEMPT_RT within non_block_start() section
Date: Fri, 21 Aug 2026 13:13:58 +0100 [thread overview]
Message-ID: <184ee54bf4445fca2ca78c74465ec6047186881f.camel@infradead.org> (raw)
In-Reply-To: <20260821095755.am1-Segb@linutronix.de>
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On Thu, 2026-08-21 at 11:57 +0200, Sebastian Andrzej Siewior wrote:
> Since spinlock_t (and rwlock_t) are not problem, add a sleeping_lock
> argument to __might_resched() signaling if this is scheduling request
> is from a sleeping lock (true) or regular scheduling request (false).
Acked-by: David Woodhouse <dwmw@amazon.co.uk>
Fixes: 312364f3534c ("kernel.h: Add non_block_start/end()")
Reported-by: syzbot+c3178b6b512446632bac@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=c3178b6b512446632bac
I've prodded syzbot; let's see if we can have a Tested-by: from it too.
I kind of also want synchronize_srcu() to be permitted too, but I guess
https://lore.kernel.org/all/6eed3fe3461e9690b486ca98fa7563f60d3940ff.camel@infradead.org/
would need to be resolved first.
Thanks.
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next prev parent reply other threads:[~2026-08-21 12:14 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-21 9:57 [PATCH] sched: Allow sleeping spinlocks on PREEMPT_RT within non_block_start()/end block Sebastian Andrzej Siewior
2026-08-21 11:46 ` Michal Hocko
2026-08-21 12:13 ` David Woodhouse [this message]
2026-09-16 15:51 ` [PATCH v2] " Sebastian Andrzej Siewior
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